# CVE-2021-42782: opensc: Stack buffer overflow issues were found in Opensc before version 0.22.0 in various places that could potentially cras...

CVE-2021-42782 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2021-42782, released April 18, 2022. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2021-42782
- Priority: Routine
- CVSS: 5.3 (medium)
- EPSS: 0.0278
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Apr 18, 2022

## Description

Stack buffer overflow issues were found in Opensc before version 0.22.0 in various places that could potentially crash programs using the library.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | opensc Debian 12.15 (bookworm) | 0.22.0-1 | [DEBIAN-CVE-2021-42782](https://patchblox.com/security/data/fix/linux/debian-cve-2021-42782.md) | Apr 18, 2022 |
| Linux | opensc Debian 13.5 (trixie) | 0.22.0-1 | [DEBIAN-CVE-2021-42782](https://patchblox.com/security/data/fix/linux/debian-cve-2021-42782.md) | Apr 18, 2022 |
| Linux | opensc Debian 14 | 0.22.0-1 | [DEBIAN-CVE-2021-42782](https://patchblox.com/security/data/fix/linux/debian-cve-2021-42782.md) | Apr 18, 2022 |
| Linux | opensc Ubuntu 20.04 LTS (focal) | 0.20.0-3ubuntu0.1~esm4 | [opensc 0.20.0-3ubuntu0.1~esm4](https://patchblox.com/security/data/fix/linux/ubuntu-focal-opensc-0.20.0-3ubuntu0.1-esm4.md) | Sep 10, 2024 |
| Linux | opensc-pkcs11 Ubuntu 20.04 LTS (focal) | 0.20.0-3ubuntu0.1~esm4 | [opensc-pkcs11 0.20.0-3ubuntu0.1~esm4](https://patchblox.com/security/data/fix/linux/ubuntu-focal-opensc-pkcs11-0.20.0-3ubuntu0.1-esm4.md) | Sep 10, 2024 |

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Data as of 2026-11-09T01:18:40Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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